Boring-bar.



G. W. CUYLER. BORING BAR.

APPLICATION FILED DBO. 1. 191a.

Patented Feb. 2, 1915.

I iyj a; JZ 27 23 /J [Fi Z /i j J Inventor Attorneys ilf [@[5/ THENORRIS PETERS co., PHOTO-LITHO wASHuvumN, LI, 0

GEORGE w. CUYLERLOF ns'rnniwrtnn, IowA.

BORING-BAR.

Specification of Letters Patent.

PatentedFeb. 2, 1915.

Application filed December 1, 19-13., Serial-No. 804,043.

To all whom it may concern Be it known that I, GEORGE WV. GUYLER, acitizen of the United States, residing at Estherville, in the county ofEmmet. and Stateof Iowa, have invented a new and. useful Boring-Bar, ofwhich, the following is a specification.

This invention relates to a boring bar and more particularly to a boringbar for cylinders which will fit within and bore an engine or pumpcylinder and without requiring that the same be detached from itssupporting base.

A further object is to provide a boring tool which is easily or readilyattached to an engine or pump cylinder withoutrequiring that the latterbe removed from the engine base or supporting structures, and whichautomatically feeds during the boring: process. I

A further object is to provide a boring baror tool which. fits withinthe piston rod stufiing box or gland and the remote end engages the boltopenings which ordinarily secure thehead to the cylinder. Thus with the;bolts disposed in the diametric openings in the cylinder head and withthe remote end passing through the stufiing box, as.- surance will behad that the boring bar will properly bore and true the surface of thecylinder. I

With the foregoing and other objects in view which will appear as thedescription proceeds", the invention, resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of theinvention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the drawings accompanying this speci fication and forming a partthereof, the preferable embodiment of my invention is illustrated, inwhich Figure 1 is a view in elevation of my improved boring barillustrating the same at tached to a cylinder, the latter being shown inlongitudinal section. Fig. 2 is a cross sectional view thereof taken onthe line 22 of Fig. 1 in which the boring tool and accessory parts havebeen revolved through 90 degrees in order to more clearly disclose theconstruction thereof.

Referring to the drawings in which similarreference numerals designatecorrespon ding parts throughout the several views, 3 isa cylinder which.is provided with the usual flange 4. and piston rod opening 5. Theopening 5 enlarges to form the stuffing box 6 coacting with which is thestuffing box gland n-ut 7. The foregoing represents a cylinder of theconventional type such as is used in connection with steam engines, airpumps, or allied machinesin which a piston reciprocates.

A bar or axle 8 extends through the open ing 5, it being noted that thepiston rod, piston head, and cylinder head being first removed. A collaror bearing 9 slidably and rotatably engages the axle 8. The bearing 9 isof such size that it fits within the stuiling box and is held concentricwith the side walls thereof by the gland, nut 7. Thus when. the collaror bearing is disposed within. the stufling box and the gland nut tightened thereagainst, the axle or bar 8 will be disposed concentricallywith respect to the side walls of the cylinder. A bracket 10 isrotatably mounted upon the axle S and is provided with the slots 11through which extend the holding bolts 12. The bolts 12 extend down andth'readedly engage the openings 13 in. the cylinder flange l and whichopenings normally hold the cylinder head to the flange which, however,has been removed. prior to the securing of the boring apparatus to. thecylinder. A pair of spacers 1.4 are positioned; upon the bolts 12intermediate the flange 4 and bracket 10 so that the bracket will beheld spaced above the cylinder. The slots. 11 of the bracket allow thebracket to be properly alined with the cylinder 4 so that the opening--15 which extends through the bracket may be positioned in longitudinalalinement with the axis of the cylinder. The opening 15 rotatablyreceives the axle 8 therethrough and which is provided with the collars16 disposed upon opposite sides of the bracket which prevent thelongitudinal shifting of the axle. The axle 8 is provided with a spline17 and which, coacting with the key 18, prevents the tool holder 19 fromrotating upon the axle; but at the same time allows the longitudinalshifting thereof. The tool holder 19 thus slidably and rotatably engagesthe axle 8 and is thus adapted to advance or retract a tool 20longitudinally of the cylinder and which is r0- tated by and with theaxle 8. The boring tool is held by any suitable means, not shown, in thetool holder so that the tool may be removed to be sharpened or anotherone replaced therefor.

A feed screw 21 threadedly engages the tool holder 19 and revolves aboutthe axle 8. The feed screw 21 is rotatably held at its upper extremityby the feed screw support 22, the latter being rigidly secured to theaxle 8 which passes therethrough. The feed screw extends through an arm23 of the feed screw. support and is held against shifting with respectthereto by the collar 21- and the spoked wheel 25. The spoked wheel inaddition to holding the screw 21 against longitudinal shifting alsoprovides means whereby the same may be rotated. A pin 26 extends throughan opening 27 in the bracket and is arranged in the path of movement ofthe spoked wheel 25 in such a manner that when the spoked wheel isrevolved about and by the axle 8, the spokes thereof will contact withthe. pin 26 and will be moved through an are proportional to the numberof spokes in the wheel. Thus the feed screw 21 will be rotated a certainfractional part of a turn during each revolution. The bracket isprovided with two equally spaced openings 27 taken with respect to thecenter and in which the pin 26 maybe placed. It is noted that if a pinbe placed in each of the openings, the amount the screw is rotatedduring each revolution will be. doubled.

The upper extremity of the axle is pro vided with the opening 29extending therethrough and through which a pin may pass to hold a powershaft thereto or by means of which a handle may be secured. Thus theaxle may be either manually or power driven and will. operate undereither condition with equal facility. Also the rate of feed may becontrolled by removing or replacing one of the pins 26. The boring baras thus constructed may be used with cylinders and does not necessitatethat the same Copies of this patent may be obtained for five cents each,by addressing the Commissioner of Patents, 5

be removed from the engine bed or supporting structures. The boring toolwill. adjust itself to cylinders of different diameters and may beeasily and quickly alined or centered so that the boring process will beaccomplished in a minimum time and with a minimum expense of labor orpower.

Having thus fully described my invention, what I claim is A boringmechanism comprising a bracket with a central bearing and with spacedoutlying slots, braces disposed beneath the said bracket, boltsextending through said slots,

through said braces, and adapted to engage a cylinder to hold thebracket a distance above the extremity thereof, an axle extendingthrough said bracket bearing, a second bearing adapted to be carried atthe op 0- site extremity of said cylinder and rotata. ly support saidaxle, means engaging said bracket bearing and axle, to prevent therelative shifting of the latter, a tool holder slidably and.non-rotatably mounted upon said shaft, a feed screw support rigidlysecured to said axle, a feed screw rotatablv and non-translatablysecured to said feed screw support and threaded through the said toolholder, a spoked wheel secured to said feed screw above and contactingwith the feed screw support and cooperating to hold said feed screwagainst shifting, said bracket provided with two openings diametricallyand symmetrically arranged with respect to the shaft, said openingsadapted to detachably receive pins therein, the de-' tachment of saidpins allowing the said feed to be accelerated and retarded and providingfor varying the periods between advancements of the tool holder.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

GEORGE W. OUYLER.

lVitnesses H. F. BAUERS, O'r'ro BROWN.

Washington, D. 0,

